Engineering Drawing-Types of Lines

A thin line made up of long and short dashes, used to indicate alternate positions or moving repeated details, or motion paths. _____________ __ __ ____________ __ __ _______

• Phantom Lines

• Hidden Lines

• Construction Lines

• Center Lines

Thin, dashed lines used to identify features that cannot be seen in a given view __ __ __ __ __ __ __ __ __ __ __ __ __ __

• Visible lines

• Border lines

• Hidden lines

• Dimension lines

Thin lines made up of long and short dashes with spaces in between, used to indicate centers of symmetrical objects. ______ __ ______ __ ______ __ ______ __ ______

• Visible lines

• Center lines

• Hidden lines

• Dimension lines

Thick lines drawn to indicate the visible edges and intersections of an object. Also called object lines. ___________________________________________

• Dimension lines

• Construction lines

• Visible lines

• Hidden lines

Thin lines normally drawn between two extension lines, with arrows or ticks at the ends and a dimension at the center.< ___________________ 8 ________________________>

• Dimension lines

• Construction lines

• Visible lines

• Hidden lines

The heaviest of lines used in drafting, serving as a "frame" for a drawing and establishing a space between the drawing and the edge of the paper.

• Dimension lines

• Construction lines

• Border lines

• Hidden lines

Very light lines used as guides for positioning objects on drawings.

• Dimension lines

• Construction lines

• Border lines

• Hidden lines

Thin lines used when drawing inside features of an object exposed by a cutting plane. Lines are drawn using patterns corresponding to different materials.

• Dimension lines

• Construction lines

• Border lines

• Section Lines

Lines that are drawn the same weight as the visible lines (approximately .024" thick). They are used to indicate where the theoretical cut is taken for a sectional view.

• Dimension lines

• Cutting-plane lines

• Border lines

• Section Lines

Lines that are drawn when a complete view is not required. Short break lines are drawn freehand and thick. Long break lines are thin, straight lines with zigzags.

• Break lines

• Cutting-plane lines

• Border lines

• Section Lines